Renewable electric fuse



Feb. 26 1924. .1,485,211

- T. BERGER RENEWABLE ELECTRIC FUSE Filed June 24. 1921 Thung/w1 Ke/gw1,

Patented Feb. 26, 1924.

UNITED STATES c l 1,485,211 PATENT oFFicE.

THURSTON BERGER, F LINDSAY, CALIFORNIA, ASSIGNOR T0 J. P. BERGER, 0FLINDSAY, CALIFORNIA.

RENEWABLE ELECTRIC FUSE.'

Application led June 24, 1921. ASerial 110.480,153.

To all wlwm t may concern.'

Beit known that I, THUns'roN BERGER, a citizen of the United States,residing at Lindsay, in the county of Tulare and State sof California,have invented new andr useful Improvements in Renewable Electric Fuses,of which the following is a specification.

This invention relates to improvements in io fuses of the cartridgetype.

y The principal obJect of this invention is to lproduce a fuse, whichmay be renewed.

nother object is to produce a fuse which will be simple in construction,cheap to 16 manufacture and one which may be used with different sizefuse'wires.

A further object is to produce a fuse wherein the fuse wire which isinserted will be forced into intimate contact with the end caps in orderto insure perfect electrical transmission.

-A still further object is to produce a fuse having a finger piece sothat the fuse as a whole may be removed from the fuse block for renewal.

Other objects and advantages of the invention will be apparent duringthe course of the following' description In the accompanying drawingsforming 30 part of this specification, and in which like numerals are emloyed to designate like parts throughout t e same,

Fig. 1 is a side view of my improved fuse,

Fig. 2 is a cross section taken on the line 2 2 of F ig. 1, v

Fig. 3 is a detail perspective view of the primarycap.

F-ig. 4 is an en d view of the secondary cap potion into which theprimary cap fits, an

Fig. 5 is a perspective view of the insulating member as a whole.v

In the transmission .of current fuses are used, which are adapted to beinserted between metallic clips.

Up to the present time, so far as applicant is aware, these fuses havebeen so constructed that the same were thrown away after burning out,and if one lacked another fuse, they Were forced to go without power orcurrent until a new fuse could be procured.

With this device a new fuse may be constructed by inserting a new fusewire, as will be later described.

In the drawings wherein for the purpose of illustration is shown apreferred embodiment of my invention, the numeral 5 designates acylindrical-insulating portion having reduced end portions 6 and 7. Ahollow bore 8 extends through this insulating meniber and a finger piece9 is preferably formed integral with the center portion 5. The reducedend portions 6 and 7 are each adapted to receive a metallic primary cap11, which cap is provided with a central opening 12 therethrough. Thisopening communicates with V shaped recesses 13 and 14 of graduallydecreasing depth as is best shown in Figures 2 and 3.

The interior of the p rimary cap 11 is formed as shown at 16 of Figure2, that is, it is internally tapered toward the opening 12. Thisformation serves to guide the fuse wire through the opening 12. Asecondary cap 17 is provided with a bayonet slot 16 adapted to receivethe stud 17 formed on the primary cap 11 so as to operatively associatethese members for a fitting engagement with each other.- In placing thecap 17 over the cap 11 it will force the fuse Wire lying within one fofthe grooves, such as 13 or 14 into conta-ct with the two caps, as willbe readily understood and is clearly shown in Figure 2 of the drawings.The fuse wire will retain these caps associated with the reduced endportions of the cylindrical insulating member 5.

The position of this fuse wire is best shown at 18y of Fig. 2.

It is understood that that the opposite ends of my fuse are identical sothat it is necessary to describe but one of these.

In assembling, a fuse wire is passed through the center of theinsulating member 5 and a primary cap is placed upon each end. Theplacing-of this cap on the insulating member allows the ends of the fusewire to protrude through the openings 12.

These ends are then bent so as to lay in grooves such as shown at 13 anda secondary 'cap is forced over each end, with the result that the fuseis then'ready to be used.

By grasping the same by the finger piece 9, the fuse may be inserted inthe fuse block without danger of receiving a shock.

It is to be understood that the form of my invention herewith shown anddescribed is to be taken as a preferred example of the same, and thatvarious changes inthe shape,

size and arrangement of the parts may be resorted to Without departingfrom the spirit of the invention, or the scope of the subjoined claims.

Having thus described myinvention, I claim In a fuse, the combination ofa tubular insulating member having a depending finger piece, saidinsulating member being` provided With a tapered end portion, a primarycap internally tapered and adapted to fit the tapered end portion ofsaid insulating member, a fuse adapted to extend through said insulatingmember and said primary cap, tapered recesses formed in said primarycap, and a secondary cap adapted to be forced over said primary ,capVfor the purpose of causing the end of said fuse to be tightly engagedin said tapered recesses.

In testimony whereof I aiX my signature. 20

THURSTON BERGER.

